The most common and most likely answer to this crossword clue is the 8 letter word RELAYING
I've seen this crossword clue in The Daily Telegraph
R
E
L
A
Y
I
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G
More clues leading to the result RELAYING
Buddy explains!
The straight part
We know that "Broadcasting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case broadcasting = relaying.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RELAYING mean?
RELAYING verb- To lay (for example, flooring or railroad track) again.
- To release a new set of hounds.
- To place (people or horses) in relays, such that one can take over from another.
- To take on a new relay of horses; to change horses.
- To pass on or transfer (information).